[INFO] fetching crate ia 0.1.2...
[INFO] documenting ia-0.1.2 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate ia 0.1.2 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate ia 0.1.2 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ia 0.1.2
[INFO] finished tweaking crates.io crate ia 0.1.2
[INFO] tweaked toml for crates.io crate ia 0.1.2 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bd70427fde4adda824818d9ee5e0a4b7cacf858415e61e86bbceef73d607f627
[INFO] running `Command { std: "docker" "start" "-a" "bd70427fde4adda824818d9ee5e0a4b7cacf858415e61e86bbceef73d607f627", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd70427fde4adda824818d9ee5e0a4b7cacf858415e61e86bbceef73d607f627", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd70427fde4adda824818d9ee5e0a4b7cacf858415e61e86bbceef73d607f627", kill_on_drop: false }`
[INFO] [stdout] bd70427fde4adda824818d9ee5e0a4b7cacf858415e61e86bbceef73d607f627
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] abc1506afba309eea56d77a48508e837887c76ee45eef16dc3cba54ce9bf9140
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "abc1506afba309eea56d77a48508e837887c76ee45eef16dc3cba54ce9bf9140", kill_on_drop: false }`
[INFO] [stderr]  Documenting ia v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::boxed::FnBox`
[INFO] [stdout]   --> src/raw.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use std::boxed::FnBox;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^ no `FnBox` in `boxed`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:71:1
[INFO] [stdout]    |
[INFO] [stdout] 71 | #![feature(fnbox)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]  --> src/executor.rs:7:51
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fut: UnsafeCell<Box<Future<Item = (), Error = !> + 'static>>
[INFO] [stdout]   |                                                   ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]   --> src/executor.rs:11:47
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn new(fut: Box<Future<Item = (), Error = !> + 'static>) -> TaskInfo {
[INFO] [stdout]    |                                               ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]   --> src/executor.rs:17:64
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn get_future(&self) -> &mut Box<Future<Item = (), Error = !> + 'static> {
[INFO] [stdout]    |                                                                ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]   --> src/utils.rs:14:18
[INFO] [stdout]    |
[INFO] [stdout] 14 |     type Error = !;
[INFO] [stdout]    |                  ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]   --> src/utils.rs:18:28
[INFO] [stdout]    |
[INFO] [stdout] 18 |     ) -> Result<Async<()>, !> {
[INFO] [stdout]    |                            ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]   --> src/net.rs:18:18
[INFO] [stdout]    |
[INFO] [stdout] 18 |     type Error = !;
[INFO] [stdout]    |                  ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]   --> src/net.rs:22:47
[INFO] [stdout]    |
[INFO] [stdout] 22 |     ) -> Result<Async<Option<TcpConnection>>, !> {
[INFO] [stdout]    |                                               ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 10 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `ia`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name ia src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern futures=/opt/rustwide/target/debug/deps/libfutures-f6a782863e1804d0.rmeta --cap-lints=warn --crate-version 0.1.2` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "abc1506afba309eea56d77a48508e837887c76ee45eef16dc3cba54ce9bf9140", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abc1506afba309eea56d77a48508e837887c76ee45eef16dc3cba54ce9bf9140", kill_on_drop: false }`
[INFO] [stdout] abc1506afba309eea56d77a48508e837887c76ee45eef16dc3cba54ce9bf9140